• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a process for purifying ethylene-alkene-diene rubbers by extraction with an extractant chosen from substances with a critical temperature below 435 °K at a temperature above the critical temperature of the extractant and a pressure above the critical pressure of the extractant.
    公开号:SU1628859A3
    申请号:SU843818854
    申请日:1984-11-16
    公开日:1991-02-15
    发明作者:Анна Леонард Клейнтиенс Людовикус
    申请人:Стамикарбон Б.В. /Лайсесинг Сабсидиари Ов Дсм/ (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the development of a method for the purification of ethylene-propylene-dienosto rubber from impurities, which consist mainly of water, the solvent used in the polymerization process (C-compound), and residual diene monomer.
    The purpose of the invention is to increase the cleaning efficiency of ethylene-propylene diene rubber from impurities, as well as to reduce the amount of extractant used.
    The method is carried out as follows.
    A 50 cm3 autoclave is loaded with a crumb of ethylene propylene diene rubber with a particle size of mm. At a pressure of 150–200 atm and 308–333 K, carbon dioxide or ethylene in the amount of 73–712 nm3 per 1 kg of impurities is passed through the rubber crumb. After passing the extractant, the crumb rubber is analyzed for the content of impurities. The method provides for preferential removal from rubber before its treatment with an extractant of water to a content not exceeding 5% of the mass of rubber. The rubber can be pre-dried by filtration, spin filtration, centrifugation and / or evaporation.
    F tO
    00 00 SP
    with /

    with
    31628859
    The process conditions and data on the removal efficiency of impurities are presented in the table.
    权利要求:
    Claims (2)
    [1]
    1. A method for cleaning ethylene-propylene diene rubber by treating wet crumb rubber with an extracting agent, characterized in that, in order to increase the cleaning efficiency of impurities that make up
    water and organic substances, the treatment is carried out with carbon dioxide or ethylene, taken in an amount of 73-712 nm3 per 1 kg of impurities, and the process is carried out at 308-333 K and a pressure of 150-200 atm.
    [2]
    2. A method according to claim 1, differing from that, in order to reduce the amount of extractant used, water is removed from the rubber before being treated with the extractant agent to a content not exceeding 5% of the mass of rubber.
    29
    5.3 0.94
    29.67 0.536
    28 5.5 1.08 1.30 0.66 1.35
    30.03 12.6
    0.502 0.600
    According to the invention
    Control
    30,200 333,269.0
    30 200 333 248.4
    60 175 323 143847,6
    Note. The indicated amount of extractant (nm) is measured at a pressure of 1 atm and a temperature of 273 K.
    Table continuation
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1628859A3|1991-02-15|Method for purification of ethylene-propylene rubber
    US5407974A|1995-04-18|Solution polymer recovery process
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    SU644370A3|1979-01-25|Method of separating dinitrophenol polymerization inhibitor from still bottoms of styrene distillation
    US2852572A|1958-09-16|Production of trichloroethylene suitable for pharmaceutical use
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    JPS63207892A|1988-08-29|Pretreatment of coal for liquefaction
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    SU937448A1|1982-06-23|Method for processing urea solutions
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    同族专利:
    公开号 | 公开日
    US4725667A|1988-02-16|
    CA1242845A|1988-10-04|
    DE3484923D1|1991-09-19|
    EP0142894B1|1991-08-14|
    JPH0674296B2|1994-09-21|
    BR8405855A|1985-09-17|
    EP0142894A3|1985-07-03|
    KR850003541A|1985-06-20|
    NL8303942A|1985-06-17|
    KR860001551B1|1986-10-04|
    JPS60118704A|1985-06-26|
    EP0142894A2|1985-05-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2577315C1|2011-12-07|2016-03-20|Джей эс а КОРПОРЕЙШН|Method for production of modified polymer and its hydrogen adduct|US2953557A|1960-09-20|Recovery of entrained polymer solids |
    US3350370A|1963-03-29|1967-10-31|Du Pont|Process for terpolymeric solvent-free hydrocarbon crumbs|
    US3378467A|1964-05-20|1968-04-16|Halcon International Inc|Method of recovering unsaturated monomer by thin film evaporation with a gas and absorption with a solvent|
    DE1795396C3|1968-09-26|1982-05-19|Basf Ag, 6700 Ludwigshafen|Process for removing volatile, odor-causing constituents from finely divided olefin polymers|
    US4124528A|1974-10-04|1978-11-07|Arthur D. Little, Inc.|Process for regenerating adsorbents with supercritical fluids|
    DE3122679A1|1981-06-06|1982-12-23|Basf Ag, 6700 Ludwigshafen|METHOD FOR THE DESODORATION OF FINE-PARTICULATED PROPYLENE POLYMERISATES OBTAINED BY ZIEGLER-NATTA CATALYSTS|
    US4695621A|1985-12-23|1987-09-22|The Dow Chemical Company|Method for reducing residual monomers from oversized fat imbibing copolymer beads|NL8600144A|1986-01-23|1987-08-17|Stamicarbon|METHOD FOR PURIFYING A THERMOPLASTIC POLYMER|
    FR2611207B1|1987-02-19|1989-07-13|Rhone Poulenc Sante|PROCESS FOR THE PURIFICATION OF STYRENE COPOLYMERS WITH VINYLPYRIDINES BY EXTRACTION USING SUPERCRITICAL GAS|
    US4842743A|1987-03-27|1989-06-27|Asahi Denka Kogyo K.K.|Method of removing solvent from chlorinated resin|
    JPH0286604A|1988-09-22|1990-03-27|Toyo Eng Corp|Method for purifying polymer|
    DE3840293A1|1988-11-30|1990-05-31|Werner & Pfleiderer|METHOD FOR REMOVING IMPURITIES FROM POLYMERIC PLASTICS, AND DEVICE FOR CARRYING OUT THE METHOD|
    EP0447177B1|1990-03-16|1996-07-03|Mobil Oil Corporation|Process for the production of linear low density ethylene copolymers|
    JPH0453804A|1990-06-21|1992-02-21|Toyo Eng Corp|Method for purifying polymer dispersion|
    US5376744A|1993-11-10|1994-12-27|The University Of Akron|Carbocationic polymerizations in supercritical CO2|
    GB2311992A|1996-04-10|1997-10-15|Bespak Plc|A method of cleaning or purifying elastomers and elastomeric articles which are intended for medical or pharmaceutical uses|
    CN101508743B|2009-03-13|2011-06-08|云南高深橡胶有限公司|Process for processing nature rubber|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    NL8303942A|NL8303942A|1983-11-17|1983-11-17|PROCESS FOR THE PURIFICATION OF A RUBBER.|
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